从 1 个 php 变量创建数组 为什么输出不同的数组？

Question

To create array from 1 php variable Why out put not same array ?

in this code i create array using php variable

<?PHP
$xxx = "'Free', 'Include', 'Offer', 'Provide'";
$xxx_array = array($xxx);
echo '<pre>'; print_r($xxx_array); echo '</pre>';
?>

and echo is

Array
(
    [0] => 'Free', 'Include', 'Offer', 'Provide'
)

how to echo like this

Array
(
    [0] => Free
    [1] => Include
    [2] => Offer
    [3] => Provide
)

Answer 1

<?php
$xxx = "'Free', 'Include', 'Offer', 'Provide'";
// Split by ","
$separatedValues = explode(',', $xxx);
// Remove the single quotation marks
for($i = 0; $i < count($separatedValues); ++$i) {
  $separatedValues[$i] = str_replace("'", '', $separatedValues[$i]);
}
var_dump($separatedValues);
?>

It is all about the explode() ( http://de.php.net/explode ) function.

Answer 2

Read up on the explode() function. The below code accomplishes what you ask.

<?PHP
    $xxx = "'Free', 'Include', 'Offer', 'Provide'";
    $xxx_array = array(explode(",", $xxx);
    echo '<pre>'; 
    print_r($xxx_array); 
    echo '</pre>';
?>

Answer 3

If you want to mimic actually creating the array (and not having the values quoted within the array), use this:

$xxx_array = array_map( function( $el) { return trim( $el, "' "); }, explode(',', $xxx));

This trims the ' and spaces from the beginning and ends of the elements after converting the string to an array.